rdefonce

I took the same system off my 02 WR for the same reason and put the stock unit back on. Without an insert it's a little loud but not too bad. The stock insert was too restrictive so I bought this one and it's right were I like it. http://www.promotobi.../products_id/54

I also have a '99 YZ400 (with stock exhaust system.) I ride in Colorado with it, and want quieter setup but that will still work on MX track. Would the promotobillet thing be a good choice for that?